N2和H2合成NH3的能量变化如图所示,该反应的热化学方程式是
A.N2(g)+3H2(g)=2NH3(l)ΔH=2(a—b—c)kJ/mol |
B.N2(g)+3H2(g)=2NH3(g)ΔH=2(b—a)kJ/mol |
C.1/2N2(g)+3/2H2(g)=NH3(l)ΔH=(b+c—a)kJ/mol |
D.1/2N2(g)+3/2H2(g)=NH3(g)ΔH=(a+b)kJ/mol |
N2和H2合成NH3的能量变化如图所示,该反应的热化学方程式是
A.N2(g)+3H2(g)=2NH3(l)ΔH=2(a—b—c)kJ/mol |
B.N2(g)+3H2(g)=2NH3(g)ΔH=2(b—a)kJ/mol |
C.1/2N2(g)+3/2H2(g)=NH3(l)ΔH=(b+c—a)kJ/mol |
D.1/2N2(g)+3/2H2(g)=NH3(g)ΔH=(a+b)kJ/mol |